166936641 has 8 divisors (see below), whose sum is σ = 234297120. Its totient is φ = 105433632.

The previous prime is 166936639. The next prime is 166936667. The reversal of 166936641 is 146639661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166936641 - 2¹ = 166936639 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 166936593 and 166936602.

It is not an unprimeable number, because it can be changed into a prime (166936631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1464300 + ... + 1464413.

It is an arithmetic number, because the mean of its divisors is an integer number (29287140).

Almost surely, 2^166936641 is an apocalyptic number.

It is an amenable number.

166936641 is a deficient number, since it is larger than the sum of its proper divisors (67360479).

166936641 is a wasteful number, since it uses less digits than its factorization.

166936641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2928735.

The product of its digits is 139968, while the sum is 42.

The square root of 166936641 is about 12920.3963174509. The cubic root of 166936641 is about 550.6181930528.

The spelling of 166936641 in words is "one hundred sixty-six million, nine hundred thirty-six thousand, six hundred forty-one".